public function translate($string)
{
$exploder = new StringExploder();
$flagMap = array();
$descriptorMap = array();
foreach ($this->descriptors as $descriptor) {
$openTag = $descriptor->getTag();
$closeTag = '/' . $openTag;
$exploder->addDescriptor(new StringExploderDescriptor("#\\[{$openTag}(=[^\\]]+)?\\]#", $openTag));
if ($descriptor->hasCloseTag()) {
$exploder->addDescriptor(new StringExploderDescriptor("#\\[{$closeTag}\\]#", $closeTag));
$flagMap[$openTag] = $closeTag;
}
$descriptorMap[$openTag] = $descriptor;
}
$array = $exploder->parse($string);
while (count($array) > 1 || count($array) > 0 && is_array($array[0])) {
$closeIndex = -1;
foreach ($array as $index => $chunk) {
if (is_array($chunk) && $chunk[1][0] === '/') {
$closeIndex = $index;
break;
}
}
$openIndex = -1;
foreach ($array as $index => $chunk) {
if (is_array($chunk) && $chunk[1][0] !== '/') {
if ($closeIndex !== -1 && $index >= $closeIndex) {
break;
} else {
$openIndex = $index;
}
}
}
if ($openIndex === -1) {
if ($closeIndex === -1) {
break;
// no more tag can be computed
} else {
$tag = $array[$closeIndex][0];
throw new Exception("Alone closing tag '{$tag}' at {$closeIndex}");
}
}
$openTag = $array[$openIndex][0];
$openFlag = $array[$openIndex][1];
$descriptor = $descriptorMap[$openFlag];
unset($array[$openIndex]);
$extractParameter = function ($openTag) {
$parts = preg_split('#=#', substr($openTag, 1, strlen($openTag) - 2), 2, PREG_SPLIT_NO_EMPTY);
return count($parts) > 1 ? $parts[1] : null;
};
if (!$descriptor->hasCloseTag()) {
$descriptor = new BBCodeDescriptor($descriptor->getTag(), $descriptor->getOpenTagCallback());
$descriptor->setContent(null);
$descriptor->setParameter($extractParameter($openTag));
$array[$openIndex] = $descriptor;
} else {
if ($closeIndex === -1) {
throw new Exception("Alone opening tag '{$openTag}' at {$openIndex}");
} else {
$closeTag = $array[$closeIndex][0];
$closeFlag = $array[$closeIndex][1];
unset($array[$closeIndex]);
if ($flagMap[$openFlag] !== $closeFlag) {
$extract = substr($string, $openIndex, $closeIndex - $openIndex + strlen($closeTag));
throw new Exception("Crossing tags for '{$extract}' at {$openIndex}");
} else {
$content = array();
$contentIndex = $openIndex + strlen($openTag);
while ($contentIndex < $closeIndex) {
$row = $array[$contentIndex];
unset($array[$contentIndex]);
$content[] = $row;
$row = $row instanceof BBCodeDescriptor ? $row->toString() : $row;
$contentIndex += strlen($row);
}
if (count($content) == 1) {
$content = $content[0];
} else {
if (count($content) == 0) {
$content = null;
}
}
$descriptor = new BBCodeDescriptor($descriptor->getTag(), $descriptor->getOpenTagCallback(), $descriptor->getCloseTagCallback(), $descriptor->getContentCallback());
$descriptor->setContent($content);
$descriptor->setParameter($extractParameter($openTag));
$array[$openIndex] = $descriptor;
}
}
}
ksort($array);
}
$root = new BBCodeDescriptor(null, null);
$root->setContent($array);
$html = $root->generateHTML();
return $html;
}
